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debSystem uses a reference counted lock, so you can acquire it
multiple times in your applications, possibly nested. Nesting
locks causes a fd leak, though, as we only increment the lock
count when we already have locked twice, rather than once, and
hence when we call lock the second time, instead of increasing
the lock count, we open another lock fd.
This fixes the code to check if we have locked at all (> 0).
There is no practical problem here aside from the fd leak, as
closing the new fd releases the lock on the old one due to the
weird semantics of fcntl locks.
(cherry picked from commit 79f012bd09ae99d4c9d63dc0ac960376b5338b32)
(cherry picked from commit 1edcb718293f24ad190703a345f8f868b6e3bcc4)
LP: #1778547
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APT clients always noticed if a method isn't supported and nowadays
generate a message of the form:
E: The method driver …/foobar could not be found.
N: Is the package apt-transport-foobar installed?
This only worked if a single source was using such an unavailable method
through as we were registering the failed config the first round and
the second would try to send requests to the not started method, which
wouldn't work and hang instead (+ hiding the error messages as they would
be shown only at the end of the execution).
Closes: 870675
(cherry picked from commit e250a8d8d8ef2f8f8c5e2041f7645c49fba7aa36)
(cherry picked from commit 281dbc8e481fbaeaf7310e0800468d4d212711b8)
LP: #1762766
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A libapt user who hasn't initialized _system likely has a reason, so we
shouldn't greet back with a segfault usually deep down in the callstack
for no reason. If the user had intended to pick up information from the
system, _system wouldn't be uninitialized after all.
LP: #1613184
SRU: 1.4.y
(cherry picked from commit cba5c5a26a9bf00724f8ea647ac61b30e32734ba)
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If the last alternative(s) of an Or group is ignored, because it does
not match an architecture list, we would end up keeping the or flag,
effectively making the next AND an OR.
For example, when parsing (on amd64):
debhelper (>= 9), libnacl-dev [amd64] | libnacl-dev [i386]
=> debhelper (>= 9), libnacl-dev |
Which can cause python-apt to crash.
Even worse:
debhelper (>= 9), libnacl-dev [amd64] | libnacl-dev [i386], foobar
=> debhelper (>= 9), libnacl-dev [amd64] | foobar
By setting the previous alternatives Or flag to the current Or flag
if the current alternative is ignored, we solve the issue.
LP: #1694697
(cherry picked from commit 7ddf958e370d13f93edc6923bee289b2f6444b41)
(cherry picked from commit 423ba4a958b9da02926e586bf59995817cafc32a)
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In the intended usecase where this serves as a hack there is no problem
with double/single quotes being present as we write it to a log file
only, but nowadays our calling of apt-key produces a temporary config
file containing this "setting" as well and suddently quoting is
important as the config file syntax is allergic to it.
So the fix is to ignore all quoting whatsoever in the input and just
quote (with singles) the option values with spaces. That gives us 99% of
the time the correct result and the 1% where the quote is an integral
element of the option … doesn't exist – or has bigger problems than a
log file not containing the quote. Same goes for newlines in values.
LP: #1672710
(cherry picked from commit 2ce15bdeac6ee93faefd4b42b57f035bef80c567)
(cherry picked from commit c75620dcfa749f8030e0180df44eec746402885d)
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This gets rid of warnings about .ucf-dist files
Reported-By: Axel Beckert (on IRC)
(cherry picked from commit 5094697fe4b2459ff6f706a22006d3028369f3fa)
(cherry picked from commit 0c42bab8534b4dc95dabdff2a8e08a3574291ec0)
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-1 is not an allowed value for the file descriptor, the only
allowed non-file-descriptor value is AT_FDCWD. So use that
instead.
AT_SYMLINK_NOFOLLOW has a weird semantic: It checks whether
we have the specified access on the symbolic link. It also
is implemented only by glibc on Linux, so it's inherently
non-portable. We should just drop it.
Thanks: James Clarke for debugging these issues
Reported-by: James Clarke <jrtc27@jrtc27.com>
(cherry picked from commit 25f54c960d7a4ceca7bd3e21f87baf48d6cbc2d3)
(cherry picked from commit 21242490e80dadb167a64c1815c08e1d2258fb61)
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In the case of build-dep and other commands where a file can be
passed we must make sure not to normalize the path name as that
can have odd side effects, or well, cause the operation to do
nothing.
Test for build-dep-file is adjusted to perform the vcard check
once as "vcard" and once as "VCard", thus testing that this
solves the reported bug.
We inline the std::transform() and optimize it a bit to not
write anything in the common case (package names are defined
to be lowercase, the whole transformation is just for names
that should not exist...) to counter the performance hit of
the added find() call (it's about 0.15% more instructions
than with the existing transform, but we save about 0.67%
in writes...).
Closes: #854794
(cherry picked from commit 85ee4036c68d8ecd2c973d413a17aca81380900b)
(cherry picked from commit 83e6e1a8fc942668f9a01906cb8349fb70a45b3d)
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Since the introduction of by-hash, two differently named
files might have the same real URL. In our case, the files
icons-64x64.tar.gz and icons-128x128.tar.gz of empty tarballs.
APT would try to merge them and end with weird errors because
it completed the first download and enters the second stage for
decompressing and verifying. After that it would queue a new item
to copy the original file to the location, but that copy item would
be in the wrong stage, causing it to use the hashes for the
decompressed item.
Closes: #838441
(cherry picked from commit 7b78e8bef1fc9de22d826db1db9df25f97d3710c)
(cherry picked from commit d2749c845954fc1ea38133b050ee49d6f6544235)
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If apt renames a file to .FAILED it leaves its namespace and is never
touched again – expect since 1.1~exp4 in which "apt clean" will remove
those files. The usefulness of these files rapidly degrades if you don't
keep the update log itself (together with debug output in the best case)
through and on 99% of all system they will be kept around forever just
to collect dust over time and eat up space.
With this commit an update call will remove all FAILED files of previous
runs, so that the FAILED files you have on disk are always only the ones
related to the last apt run stopping apt from hoarding files.
Closes: 846476
(cherry picked from commit 7ca83492e802967f183babf06ab541b1b51f1703)
(cherry picked from commit c8540403ed35fa36e1610fd90aeae8f66c126fdb)
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Keeping the Fd of the cache file we have validated around to later load
it into the mmap ensures not only that we load the same file (which
wouldn't really be a problem in practice), but that this file also still
exists and wasn't deleted e.g. by a 'apt clean' call run in parallel.
(cherry picked from commit 06606f073210fe3902fe92d5ff77fa1ab621b972)
(cherry picked from commit 2e5726edcac4fc9228c6b16281365c3ade189b8b)
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Again no practical difference, but for consistency a boolean option
should really be accessed via a boolean method rather than an int
especially if you happen to try setting the option to "true" …
Gbp-Dch: Ignore
(cherry picked from commit c15ba854b6736696f164e4d2c243a944e2d4006e)
(cherry picked from commit c0dc26456ba74da449eae11c04c3edb3b5f1e35e)
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This can happen e.g. for file: repositories. There is no inherent
problem with setting such values internally, but its bad style,
forbidden in the manpage and could be annoying in the future.
Gbp-Dch: Ignore
(cherry picked from commit 44ecb8c3579e5ae8828f83530e4151a0ff84d5d6)
(cherry picked from commit fec19de5e786564ed8699b38310f7d1a7c348c01)
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apt tools do not really support these other variables, but tools apt
calls might, so lets play save and clean those up as needed.
Reported-By: Paul Wise (pabs) on IRC
(cherry picked from commit e2c8c825a5470e33c25d00e07de188d0e03922c8)
(cherry picked from commit 52067bd0a9e23642b7fa791fb63f4b69cafceb36)
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We can't cleanup the environment like e.g. sudo would do as you usually
want the environment to "leak" into these helpers, but some variables
like HOME should really not have still the value of the root user – it
could confuse the helpers (USER) and HOME isn't accessible anyhow.
Closes: 842877
(cherry picked from commit 34b491e735ad47c4805e63f3b83a659b8d10262b)
(cherry picked from commit cc5919076ba1c2dab773a6c06cb3dd5497f0c656)
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A user relying on the deprecated behaviour of apt-get to accept a source
with an unknown pubkey to install a package containing the key expects
that the following 'apt-get update' causes the source to be considered
as trusted, but in case the source hadn't changed in the meantime this
wasn't happening: The source kept being untrusted until the Release file
was changed.
This only effects sources not using InRelease and only apt-get, the apt
binary downright refuses this course of actions, but it is a common way
of adding external sources.
Closes: 838779
(cherry picked from commit 84eec207be35b8c117c430296d4c212b079c00c1)
LP: #1657440
(cherry picked from commit 5605c9880f36c764baaca59328777d34645a32fa)
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This is a follow up to the previous issue where we did not check
if getline() returned -1 due to an end of file or due to an error
like memory allocation, treating both as end of file.
Here we ensure that we also handle buffered writes correctly by
flushing the files before checking for any errors in our error
stack.
Buffered writes themselves were introduced in 1.1.9, but the
function was never called with a buffered file from inside
apt until commit 46c4043d741cb2c1d54e7f5bfaa234f1b7580f6c
which was first released with apt 1.2.10. The function is
public, though, so fixing this is a good idea anyway.
Affected: >= 1.1.9
(cherry picked from commit 6212ee84a517ed68217429022bd45c108ecf9f85)
(cherry picked from commit e115da452632a024a2885fea27a6c2c5145282b1)
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This fixes a security issue where signatures of the
InRelease files could be circumvented in a man-in-the-middle
attack, giving attackers the ability to serve any packages
they want to a system, in turn giving them root access.
It turns out that getline() may not only return EINVAL
as stated in the documentation - it might also return
in case of an error when allocating memory.
This fix not only adds a check that reading worked
correctly, it also implicitly checks that all writes
worked by reporting any other error that occurred inside
the loop and was logged by apt.
Affected: >= 0.9.8
Reported-By: Jann Horn <jannh@google.com>
Thanks: Jann Horn, Google Project Zero for reporting the issue
LP: #1647467
(cherry picked from commit 51be550c5c38a2e1ddfc2af50a9fab73ccf78026)
(cherry picked from commit 4ef9e0837ce139b398299431ae2294882f531d8e)
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This reverts commit 1b63558a39ee1eed7eb024cd0e164d73beb165b1.
This commit caused a regression in the unit tests: The error was
propagated to Close(), where we expected it to return true.
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The C.UTF-8 locale is not portable, so we need to use C, otherwise
we crash on other systems. We can use std::locale::classic() for
that, which might also be a bit cheaper than using locale("C").
(cherry picked from commit 0fb16c3e678044d6d06ba8a6199b1e96487ee0d8)
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In 3bdff17c894d0c3d0f813d358fc45d7a263f3552 we did it for the datetime
parsing, but we use the same style in the parsing for pdiff (where the
size of the file is in the middle of the three fields) so imbueing here
as well is a good idea.
(cherry picked from commit 1136a707b7792394ea4b1d039dda4f321fec9da4)
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This time it is the formatting of floating numbers in progress
reporting with a radix charater potentially not being dot.
Followup of 7303e11ff28f920a6277c159aa46f80c007350bb. Regression of
b58e2c7c56b1416a343e81f9f80cb1f02c128e25 in so far as it exchanging
very effected with slightly less effected code.
LP: 1611010
(cherry picked from commit 0919f1df552ddf022ce4508cbf40e04eae5ef896)
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Followup of b58e2c7c56b1416a343e81f9f80cb1f02c128e25.
Still a regression of sorts of 8b79c94af7f7cf2e5e5342294bc6e5a908cacabf.
Closes: 832044
(cherry picked from commit 7303e11ff28f920a6277c159aa46f80c007350bb)
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Rewritten in 9febc2b238e1e322dce1f94ecbed46d595893b52 for c++ locales
usage and rewritten again in 1d742e01470bba27715a8191c50adde4b39c2f19 to
avoid a currently present stdlibc++6 bug in the std::get_time
implementation. The later implementation uses still stringstreams for
parsing, but forgot to explicitly reset the locale to something sane
(for parsing english dates that is), so date and especially the parsing
of a number is depending on the locale. Turns out, the French (among
others) format their numbers with space as thousand separator so for
some reason the stdlibc++6 thinks its a good idea to interpret the
entire datetime string as a single number instead of realizing that in
"25 Jun …" the later parts can't reasonably be part of that number even
through there are spaces there…
Workaround is hence: LC_NUMERIC=C.UTF-8
Closes: 828011
(cherry picked from commit 3bdff17c894d0c3d0f813d358fc45d7a263f3552)
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As reported upstream in
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71556
the implementation of std::get_time is currently not as accepting as
strptime is, especially in how hours should be formatted.
Just reverting 9febc2b238e1e322dce1f94ecbed46d595893b52 would be
possible, but then we would reopen the problems fixed by it, so instead
I opted here for a rewrite of the parsing logic which makes this method
a lot longer, but at least it provides the same benefits as the rewrite
in std::get_time was intended to give us and decouples us from the fix
of the issue in the standard library implementation of GCC.
LP: 1593583
(cherry picked from commit 1d742e01470bba27715a8191c50adde4b39c2f19)
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HTTP/1.1 hardcodes GMT (RFC 7231 §7.1.1.1) and what is good enough for the
internet must be good enough for us™ as we reuse the implementation
internally to parse (most) dates we encounter in various places like the
Release files with their Date and Valid-Until header fields.
Implementing a fully timezone aware parser just feels too hard for no
effective benefit as it would take 5+ years (= until LTS's are out of
fashion) until a repository could use non-UTC dates and expect it to
work. Not counting non-apt implementations which might or might not
only want to encounter UTC here as well.
As a bonus, this eliminates the use of an instance of setlocale in
libapt.
Closes: 819697
(cherry picked from commit 9febc2b238e1e322dce1f94ecbed46d595893b52)
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(cherry picked from commit eceb219c2a64f3f81421c3c6587380b6ae81a530)
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This fixes a regression introduced in
commit 8f858d560e3b7b475c623c4e242d1edce246025a
don't leak FD in AutoProxyDetect command return parsing
which accidentally made the proxy autodetection code also read
the scripts output on stderr, not only on stdout when it switched
the code from popen() to Popen().
Reported-By: Tim Small <tim@seoss.co.uk>
(cherry picked from commit 0ecceb5bb9cc8727c117195945b7116aceb984fe)
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If the dependency line does not contain spaces in the repository
but does in the dpkg status file (because dpkg normalized the
dependency list), the dpkg line might be longer than the line
in the repository. If it now happens to be longer than 1024
characters, it would be skipped, causing the hashes to be
out of date.
Note that we have to bump the minor cache version again as
this changes the format slightly, and we might get mismatches
with an older src cache otherwise.
Fixes Debian/apt#23
(cherry picked from commit 708e2f1fe99e6f067292bc909f03f12c181e4798)
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memcpy is marked as nonnull for its input, but ignores the input anyhow
if the declared length is zero. Our SHA2 implementations do this as
well, it was "just" MD5 and SHA1 missing, so we add the length check
here as well as along the callstack as it is really pointless to do all
these method calls for "nothing".
Reported-By: gcc -fsanitize=undefined
(cherry picked from commit 644478e8db56f305601c3628a74e53de048b28c8)
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If the inner Base256ToNum() returned false, it did not set
Num to a new value, causing it to be uninitialized, and thus
might have caused the function to exit despite a good result.
Also document why the Res = Num, if (Res != Num) magic is done.
Reported-By: valgrind
(cherry picked from commit cf7503d8a09ebce695423fdeb2402c456c18f3d8)
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Adding 1 to the value of d->End - current makes restLength one byte
too long: If we pass memchr(current, ..., restLength) has thus
undefined behavior.
Also, reading the value of current has undefined behavior if
current >= d->End, not only for current > d->End:
Consider a string of length 1, that is d->End = d->Current + 1.
We can only read at d->Current + 0, but d->Current + 1 is beyond
the end of the string.
This probably caused several inexplicable build failures on hurd-i386
in the past, and just now caused a build failure on Ubuntu's amd64
builder.
Reported-By: valgrind
(cherry picked from commit 923c592ceb6014b31ec751b97b3ed659fa3e88ae)
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If a Binary field contains one or more spaces before a comma, the
code produced a segmentation fault, as it accidentally set a pointer
to 0 instead of the value of the pointer.
If the comma is at the beginning of the field, the code would
create a binStartNext that points one element before the start
of the string, which is undefined behavior.
We also need to check that we do not exit the string during the
replacement of spaces before commas: A string of the form " ,"
would normally exit the boundary of the Buffer:
binStartNext = offset 1 ','
binEnd = offset 0 ' '
isspace_ascii(*binEnd) = true => --binEnd
=> binEnd = - 1
We get rid of the problem by only allowing spaces to be eliminated
if they are not the first character of the buffer:
binStartNext = offset 1 ','
binEnd = offset 0 ' '
binEnd > buffer = false, isspace_ascii(*binEnd) = true
=> exit loop
=> binEnd remains 0
(cherry picked from commit ce6cd75dc367b92f65e4fb539dd166d0f3361f8c)
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An absolute filename for a *.deb file starts with a /. A package with
the name of the file is inserted in the cache which is provided by the
"real" package for internal reasons. The pinning code detects a regex
based wildcard by having the regex start with /. That is no problem
as a / can not be included in a package name… expect that our virtual
filename package can and does.
We fix this two ways actually: First, a regex is only being considered a
regex if it also ends with / (we don't support flags). That stops our
problem with the virtual filename packages already, but to be sure we
also do not enter the loop if matcher and package name are equal.
It has to be noted that the creation of pins for virtual packages like
the here effected filename packages is pointless as only versions can be
pinned, but checking that a package is really purely virtual is too
costly compared to just creating an unused pin.
Closes: 835818
(cherry picked from commit e950b7e2f89b5e48192cd469c963a44fff9f1450)
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This fixes issues with chroots, but the goal here was to get
the test suite working on systems without dpkg.
(cherry picked from commit 2ed62ba6abcad809d1898a40950f86217af73812)
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We basically called ourselves before, creating an endless loop.
Reported-By: clang
(cherry picked from commit d651c4cd71a43c385c3d3bcd3a9f25bf0a67f8f2)
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Instead of erroring out when receiving a SIGINT, let the
child deal with it - we'll error out anyway if the child
exits with an error or due to the signal. Also ignore
SIGQUIT, as system() ignores it.
This basically fixes Bug #832593, but: we are running
the hooks via sh -c. Some shells exit with a signal
error even if the command they are executing catches
the signal and exits successfully. So far, this has
been noticed on dash, which unfortunately, is our
default shell.
Example:
$ cat trap.sh
trap 'echo int' INT; sleep 10; exit 0
$ if dash -c ./trap.sh; then echo OK: $?; else echo FAIL: $?; fi
^Cint
FAIL: 130
$ if mksh -c ./trap.sh; then echo OK: $?; else echo FAIL: $?; fi
^Cint
OK: 0
$ if bash -c ./trap.sh; then echo OK: $?; else echo FAIL: $?; fi
^Cint
OK: 0
(cherry picked from commit a6ae3d3df490e7a5a1c8324ba9dc2e63972b1529)
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In af81ab9030229b4ce6cbe28f0f0831d4896fda01 we implement by-hash as a
special compression type, which breaks this filesize setting as the code
is looking for a foobar.by-hash file then. Dealing this slightly gets
us the intended value. Note that this has no direct effect as this value
will be set in other ways, too, and could only effect progress reporting.
Gbp-Dch: Ignore
(cherry picked from commit 3084ef2292642d43e533654354a4929abe55d91b)
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Since its existence in 2010 DirectoryExists was always marked with this
attribute, but for no real reason. Arguably a check for the existence of
the file is not modifying global state, so theoretically this shouldn't
be a problem. It is wrong from a logical point of view through as
between two calls the directory could be created so the promise we made
to the compiler that it could remove the second call would be wrong, so
API wise it is wrong.
It's a bit mysterious that this is only observeable on ppc64el and can be
fixed by reordering code ever so slightly, but in the end its more our
fault for adding this attribute than the compilers fault for doing
something silly based on the attribute.
LP: 1473674
(cherry picked from commit 9445fa62386c80c9822e77484d30b2109aa0f2dc)
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When checking if a file is empty, we forget to check that
fstat() actually worked.
(cherry picked from commit 15fe8e62d37bc87114c59d385bed7ceefb72886b)
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If the URI had no password the username was ignored
(cherry picked from commit a1f3ac8aba0675321dd46d074af8abcbb10c19fd)
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APT (usually) knows which package is essential or not, so we can avoid
passing this force flag to dpkg unconditionally if the user hasn't
chosen a non-default essential handling obscuring the information.
(cherry picked from commit d3930f8716f439c229cd3d11813823d847a2ecff)
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Previously, when data could be created and sig not, we would unlink
sig, not data (and vice versa).
(cherry picked from commit d0d06f44ed60a3888528d834a799bae86c2978d5)
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There is no point in trying to perform Write/Read on a FileFd which
already failed as they aren't going to work as expected, so we should
make sure that they fail early on and hard.
(cherry picked from commit 02c38073af51802c02bb104d4450e0e112d641ad)
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Reported-By: cppcheck
Gbp-Dch: Ignore
(cherry picked from commit 196d590a99e309764e07c9dc23ea98897eebf53a)
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If another file in the transaction fails and hence dooms the transaction
we can end in a situation in which a -patched file (= rred writes the
result of the patching to it) remains in the partial/ directory.
The next apt call will perform the rred patching again and write its
result again to the -patched file, but instead of starting with an empty
file as intended it will override the content previously in the file
which has the same result if the new content happens to be longer than
the old content, but if it isn't parts of the old content remain in the
file which will pass verification as the new content written to it
matches the hashes and if the entire transaction passes the file will be
moved the lists/ directory where it might or might not trigger errors
depending on if the old content which remained forms a valid file
together with the new content.
This has no real security implications as no untrusted data is involved:
The old content consists of a base file which passed verification and a
bunch of patches which all passed multiple verifications as well, so the
old content isn't controllable by an attacker and the new one isn't
either (as the new content alone passes verification). So the best an
attacker can do is letting the user run into the same issue as in the
report.
Closes: #831762
(cherry picked from commit 0e071dfe205ad21d8b929b4bb8164b008dc7c474)
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We read the entire input file we want to patch anyhow, so we can also
calculate the hash for that file and compare it with what he had
expected it to be.
Note that this isn't really a security improvement as a) the file we
patch is trusted & b) if the input is incorrect, the result will hardly be
matching, so this is just for failing slightly earlier with a more
relevant error message (althrough, in terms of rred its ignored and
complete download attempt instead).
(cherry picked from commit 6e71ec6fcdcaa926c98fa58cd4af38e42556df15)
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The flush call is a no-op in most FileFd implementations so this isn't
as critical as it might sound as the only non-trivial implementation is
in the buffered writer, which tends not be used to buffer another
buffer…
(cherry picked from commit 8ca481e8419c19b6ef9074b68cc028177a507161)
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If we don't give a specific error to report up it is likely that all
error currently in the error stack are equally important, so reporting
just one could turn out to be confusing e.g. if name resolution failed
in a SRV record list.
(cherry picked from commit b50dfa6b2dd2d459e0c2746ac9367982b96ffac0)
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If we have files in partial/ from a previous invocation or similar such
those could be symlinks created by file:// sources. The code is
expecting only real files through and happily changes owner,
modification times and permission on the file the symlink points to
which tend to be files we have no business in touching in this way.
Permissions of symlinks shouldn't be changed, changing owner is usually
pointless to, but just to be sure we pick the easy way out and use
lchown, check for symlinks before chmod/utimes.
Reported-By: Mattia Rizzolo on IRC
(cherry picked from commit 3465138575e1fd0d5892d9b6be1ae232eb873460)
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